I guess it was not a bad idea to send out free food, cause after seing my fish reaction to the flakes, I went out and purchased micro pellets, frozen brine, and other things
I don't know if it's available outside of the UK, but I swear by JMC brand foods. The catfish pellets will induce even the most stressed plec to feed and they promote glorious colours and rapid growth in anything that eats them.